Abstract: A method and bed system for controlling a mattress climate-control system based on a thermal event. The bed system includes a mattress, a mattress climate-control system, a mechanical thermal detector, and a controller. The mattress climate-control system controls a climate at the mattress. The mechanical thermal detector is positioned at the mattress. A condition of the mechanical thermal detector changes in response to a thermal event at the mattress. The controller is connected to the mattress climate-control system. The controller perform operations including detecting the condition of the mechanical thermal detector and operating the mattress climate-control system based on the condition of the mechanical thermal detector.